| abstract |
A UV-resistant coating composition for protecting polyurethane surfaces, particularly in a marine environment above the sea-air interface (called the "wave action zone"), is formed from a polyether polyol based on amorphous hydrophobic dimeric fatty acids and an aliphatic isocyanate, such as hexamethylene diisocyanate, and may include a UV blocking agent such as titanium dioxide. The polyol can be modified with a chain extender. The composition provides an elastomeric barrier protecting against UV exposure, and is useful on polyurethane surfaces on curvature stiffeners, buoys, etc. |